Melt butter or margarine in medium saucepan. Add onions and saute until tender.Add Piggly Wiggly Country Gravy and milk.Heat, stirring constantly, until smooth and hot.Stir in cheese and heat until melted. Stir in potatoes. Heat over low heat 5 minutes.Spoon into bowls and top with sour cream, green onions and bacon. Makes 4 to 6 servings.